Drilling machine



FIG. 1 is a perspective front view from above and right side of a drilling machine showing my new design;

FIG. 2 is a perspective front view from above and left side thereof;

FIG. 3 is a perspective rear view from above and left side thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a perspective view of the drilling machine with boom extended on a reduced scale.

The crisscross pattern fragmentarily shown in FIGS. 1, 2, 3, 6, 7 and 8 is understood to extend uniformly throughout the areas represented. 

The ornamental design for a drilling machine, as shown and described. 